You get symbol support by assembling with the ADATA option and using ASMLANGX to create an extraction file from the SYSADATA file.

This allows you to enter instruction and data addresses in symbolic notation, and show data areas with their associated labels, or in an unformatted display.

IDF provides a disassembly capability, with code section (CSECT) and external symbols intensified. Storage references are disassembled to their symbolic names wherever possible.

Conditional branch instructions are disassembled to their extended mnemonics unless you specify otherwise.